Method of programming a multi level cell
US7948805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2010 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Oct 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5621
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of programming a multi level cell in a non-volatile memory device includes: performing a program operation on main cells and indicator cells; performing a first verifying operation on the main cells and the indicator cells based on a first verifying voltage; performing repeatedly the program operation and the first verifying operation until a threshold voltage of a first cell of the indicator cells is higher than the first verifying voltage; and performing a second verifying operation on the main cells and the indicator cells based on a second verifying voltage when the threshold voltage of the first cell is higher than the first verifying voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.